Bole and China clay

Bole noun - The main stem of a tree; usually covered with bark; the bole is usually the part that is commercially useful for lumber.

China clay and bole are semantically related. In some cases you can use "China clay" instead a noun "Bole".

China clay noun - A fine usually white clay formed by the weathering of aluminous minerals (as feldspar); used in ceramics and as an absorbent and as a filler (e.g., in paper).

Bole and china clay are semantically related. Sometimes you can use "Bole" instead a noun phrase "China clay".